Fountain-pen.



J. M. REYNOLDS.

FOUNTAIN PEN.

APPLICATION FILED MAY 5. 1911.

3 & Q

Patented Dec. 3, 1918.

. e no TORNEY JOHN M. REYNOLDS, F BIIQNTBQSE, COLORADO.

FOUNTAIN-PEN.

Specification of Letters Patent.

Application filled may 5, 1917. serial Ito. 166,745.

To all whom it may concern Be it known thatI, JOHN M. REYNOLDS, a citizen of the United States, residing at Montrose, in the county of Montrose and State of Colorado, have invented certain new and useful Improvements in Fountain- Pens, of which the following is a specifica-. tion.

This invention relates to fountain pens, to and my object is to produce a device of this character having large ink capacity relative to its size and prov1ded with a piston for creating a vacuum to effect the filling operation quickly and efi'iciently.

A further object is to produce afountain pen of simple, strong, and durable construction.

With these objects in viewand others as hereinafter appear, the invention consists in certain novel and peculiarfeatures of construction and combinations of parts as hereinafter described and claimed; and in order that it may be fully understood reference is to be had to the accompanying drawing, in which:

Figure 1 is'a magnified view partly in elevation and partly in central vertical section of a fountain pen embodying my invention.

Fig. 2, is a view of the same character with 80 the operative parts in a position assumed preparatory to'the filling of the pen with ink, certain of the parts shown in Fig. 1 being omitted, and other parts being of slightly modified form.

Fig. 3, is a cross section on the line III-4H of Fig. 1, on an enlarged scale.

Fig. 4, is a section on the line IV-EIV of Fig. 2, on the same scale as Fig. 3.

Fig. 5, is a section on the line V-V of Fig. 2, on the same scale as Figs. 3 and 4.

Fig.6, is a section on the line VI-Vl of Fig. 1.

In the said drawing,'1 indicates the cylin-l' drical barrel of the pen. In Fig. 1 the barrel at one end is provided with an external thread 2 and at the opposite end with an internal thread 3. In Fig. 2 the barrel is composed of sections having a screw joint 4. The front end of the barrel is provided with the customary longitudinal bore 5 for the reception of the pen 6 and the plug for holding the pen in place and feeding ink to said pen, said plug 7 being of well-known type and therefore not detailed. Near the 65 rear end of the plug the barrelchamber is enlarged to provide a plurality of by-pass pas sages 8, and in Figs. 2 and 4 said toy-pass passages are formed with extensions 9 communicating with the bore 5, for a purpose hereinafter explained, and the mouth or inner end of said bore is preferably flared in both forms as shown at 10.

In Figs. 1 and 2, the barrels are respectively provided near their rear ends with centrally perforated partitions 11 and 11*, that Patented. Dec. 3, i913.

the barrel and the perforated partition and packing gland, and mounted rigidly upon the rear end of said stem 15 and screwed into the rear end of the barrel is a closing plug 16.

When the closing plug is screwed home, the said stem projects into the flared mouth of the bore 5, and from its front end to a point intermediate the length of the by-pass passages 8, said stem is slightly enlarged and provided with central bore 17 and with a transverse slot 18, and rearward of said slot a stop collar 19 is secured on the stem, said collar being disposed at the rear endof the enlargement of the stem and of slightly greater diameter than said enlargement. Forward of the transverse slot the enlargement of the stem is provided with a stop collar 20, and fitting slidingly on the said onlargement and limited. in its sliding movement by said collars is a piston 21 which constitutes an air-tight partition for the barrel when disposed at any point within the same, except where enlarged by said by-passes.

A cap tube 22 for the pen point when not in service, is provided with threads 23 for engagement with threads 2. When the pen is to be used the cap is fitted on the'rear end of the barrel.

Assuming that the pen is charged with ink and that parts are disposed as shown in Fig. 1, it willbeseen that ink can flow through the by-pass passages to the front side of the piston, and then pass through the transverse slot 18 into the bore of the piston stem and thence escape to the point of the pen in the customary manner. When the supply of ink is exhausted, the person in charge unscrews the plug 16, and in this action withdraws the piston stem until collar 20 engages the piston and imparts corresponding movement thereto. When the plug is totally unscrewed, the person in charge pulls rearward upon the same until the piston is arrested by the abutment of collar 19 against the front side of the partition 11. With the parts arranged as explained, pressure is applied upon the plug to force the piston forward, through the abutment thereagainst of the collar 19, to create a vacuum in the barrel behind the piston, and when the latter has attained a position adjacent the rear end of the by-pass passages, the pen point and the front end of the barrel are submerged in writing fluid. I By the time the plug is screwed a. convolution or two into the barrel with the parts proportioned substantially as shown, the piston will be overlapping the bypasses. The continued forward movement of the piston is then continued as before, and the instant the air-tight joint between the piston and the barrel is broken by the disposition of the former between the ends of the by-pass passages, atmospheric pressure on the writing fluid instantly forces a suliicient quantity of such fluid into the pen to fully charge the barrel, and when the pen is withdrawn from the supply of fluid, and wiped it is ready for service, as will be readily understood. It the piston should slip or. work forward on the enlargement of the piston. stem, ink will be enabled to flow ]l1Stthe same, if the slot 17 exceeds in length the width of "the piston so the fluid could enter said slot behind the Piston.

In Fig. 2 where the by-passes are provided with extensions 9, it is obvious that the stoppage of the slot 17 cannot interfere with the'proper feeding of the ink, as the same will pass through said by-pass extensions to the bore 5, and thence flow to the pen point. The slot is necessary however as it forms the exit for air and writing fluid back of the piston when the latter is being drawn back preliminary to the forward stroke necessary in producing the vacuum for efi'ecting the refilling of the pen.

. From the above description it will be apparent that I have produced a device of the.

character described which possesses all of the features of advantage enumerated in the ob ject of the invention, and I wish it to be understood that while I have illustrated and described. what now appears to be the preferred construction of the device I reserve the right to all changes-falling within the spirit and scope of the appended claim.

I claim:

A fountain pen comprising a barrel, having a bore'communicating with the front end of the chamber of the barrel, a by-pass ate the ends of said by-pass when said enlargement engages said bore; said stem being provided in its front end and forward of said collar with a bore communicating with the sa-id'bore of the barrel and between said collar and enlargement with a transverse slot communicating with the said bore, and a piston fitting slidingly on said stem between the enlargement and collar and adapted when the stem is drawn rearward to be forced by the enlargement thereof rearwardly in said chamber and when the piston is forced forwardly in said chamber, to be moved in a corresponding direction by the said collar of the piston.

In testimony whereof, I afiix my signature.

JOHN M. REYNOLDS. 

